SendHeron
Drafts your product's lifecycle emails from a URL; nothing sends until you approve it.
SendHeron reads your website, proposes the event tags your product should emit, then drafts a full lifecycle email suite — welcome, trial, win-back, cancel-save — in your brand voice; nothing activates or sends until you approve each sequence yourself. It's built by the team behind PostFast, which runs its own production lifecycle email (trial activation, win-back, churn-save, dunning) through SendHeron. Pricing is €19/month at 10,000 contacts, EU-based with EU data residency, with a 7-day free trial covering 1,000 contacts and 5,000 sends.
What holds up
- +Nothing sends until you personally approve each drafted sequence — the AI only proposes
- +Runs its maker's own production email (PostFast) — a real dogfooded case, not just a demo
- +56 documented REST API endpoints, built to be wired directly into your own backend
Mind the limits
- −A bounce blocks every email stream, transactional and marketing, for that contact — no separating the two
- −An unsubscribe only blocks marketing for the one brand it was given to, not across all your brands
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